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Low slip rates and long-term preservation of geomorphic features in Central Asia

Author

Listed:
  • Ralf Hetzel

    (GeoForschungsZentrum Potsdam, Telegrafenberg
    Universität Potsdam)

  • Samuel Niedermann

    (GeoForschungsZentrum Potsdam, Telegrafenberg)

  • Mingxin Tao

    (Chinese Academy of Science)

  • Peter W. Kubik

    (Paul Scherrer Institut, c/o the Institute of Particle Physics, ETH Hönggerberg)

  • Susan Ivy-Ochs

    (Institute of Particle Physics, ETH Hönggerberg)

  • Bo Gao

    (Chinese Academy of Science)

  • Manfred R. Strecker

    (Universität Potsdam)

Abstract

In order to understand the dynamics of the India–Asia collision zone, it is important to know the strain distribution in Central Asia, whose determination relies on the slip rates for active faults1,2,3,4,5. Many previous slip-rate estimates of faults in Central Asia were based on the assumption that offset landforms are younger than the Last Glacial Maximum (∼20 kyr ago)6,7,8,9,10,11. In contrast, here we present surface exposure ages of 40 to 170 kyr, obtained using cosmogenic nuclide dating, for a series of terraces near a thrust at the northern margin of the Tibetan Plateau. Combined with the tectonic offset, the ages imply a long-term slip rate of only about 0.35 mm yr-1 for the active thrust, an order of magnitude lower than rates obtained from the assumption that the terraces formed after the Last Glacial Maximum. Our data demonstrate that the preservation potential of geomorphic features in Central Asia is higher than commonly assumed.

Suggested Citation

  • Ralf Hetzel & Samuel Niedermann & Mingxin Tao & Peter W. Kubik & Susan Ivy-Ochs & Bo Gao & Manfred R. Strecker, 2002. "Low slip rates and long-term preservation of geomorphic features in Central Asia," Nature, Nature, vol. 417(6887), pages 428-432, May.
    • Handle: RePEc:nat:nature:v:417:y:2002:i:6887:d:10.1038_417428a
    DOI: 10.1038/417428a
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